Huawei Call Reestablishment RAN14

Call Reestablishment RAN

Feature Parameter Description

Issue 03

Date 2013-11-30

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2013. All rights reserved.

No part of this document may be reproduced or transmitted in any form or by any means without prior

written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective

holders.

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and

the customer. All or part of the products, services and features described in this document may not be

within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements,

information, and recommendations in this document are provided "AS IS" without warranties, guarantees or

representations of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the

preparation of this document to ensure accuracy of the contents, but all statements, information, and

recommendations in this document do not constitute the warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

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Website: http://www.huawei.com

Email: [email protected]

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mailto:[email protected]

WCDMA RAN

Call Reestablishment Contents

Issue 03 (2013-11-30) Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd

i

Contents

1 About This Document ................................................................................................................. 1

1.1 Scope ............................................................................................................................................... 1

1.2 Intended Audience............................................................................................................................ 1

1.3 Change History ................................................................................................................................. 1

2 Overview......................................................................................................................................... 3

2.1 Introduction ....................................................................................................................................... 3

2.2 Benefits ............................................................................................................................................ 3

2.3 Architecture ...................................................................................................................................... 3

3 Uplink RL Failure ......................................................................................................................... 7

3.1 Uplink RL Failure Detection .............................................................................................................. 7

3.2 Call Reestablishment ....................................................................................................................... 8

3.2.1 Triggering ................................................................................................................................. 8

3.2.2 Implementation ...................................................................................................................... 12

4 SRB Reset .................................................................................................................................... 14

4.1 SRB Reset Detection ..................................................................................................................... 14

4.2 Call Reestablishment ..................................................................................................................... 16

5 TRB Reset .................................................................................................................................... 17

5.2 TRB Reset Detection ...................................................................................................................... 17


6 Air-Interface Process Overlap ................................................................................................ 19

6.1 Air-Interface Process Overlap Detection ........................................................................................ 19

6.1.1 Scenario 1 ............................................................................................................................. 19

6.1.2 Scenario 2 ............................................................................................................................. 22


7 Air-Interface Process Timeout ................................................................................................ 25

7.1 Air-Interface Process Timeout Detection ........................................................................................ 25

7.1.1 Radio Bearer Setup Timeout ................................................................................................. 25

7.1.2 Physical Channel Reconfiguration Timeout........................................................................... 26


8 Related Features ........................................................................................................................ 29

8.1 Prerequisite Features ..................................................................................................................... 29

8.2 Mutually Exclusive Features .......................................................................................................... 29

8.3 Impacted Features ......................................................................................................................... 29

9 Network Impact ........................................................................................................................... 30

9.1 System Capacity ............................................................................................................................ 30

9.2 Network Performance .................................................................................................................... 30

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10 Implementation ......................................................................................................................... 31

10.1 When to Use Call Reestablishment ............................................................................................. 31

10.2 Required Information .................................................................................................................... 31

10.3 Planning ....................................................................................................................................... 31

10.4 Deploying Call Reestablishment .................................................................................................. 31

10.4.1 Requirements ...................................................................................................................... 31

10.4.2 Data Preparation ................................................................................................................. 31

10.4.3 Function Activation .............................................................................................................. 34

10.4.4 MML Command Example .................................................................................................... 36

10.4.5 Activation Observation ......................................................................................................... 36

10.4.6 Deactivation ......................................................................................................................... 36

10.4.7 MML Command Example .................................................................................................... 37

10.5 Performance Monitoring ............................................................................................................... 37

10.6 Parameter Optimization ............................................................................................................... 38

10.7 Troubleshooting ............................................................................................................................ 38

11 Parameters................................................................................................................................. 39

12 Counters..................................................................................................................................... 72

13 Glossary ..................................................................................................................................... 73

14 Reference Documents ............................................................................................................ 74

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Call Reestablishment 1 About This Document



1

1 About This Document

1.1 Scope

This document describes the WRFD-140103 Call Reestablishment, including its technical principles, related features, network impact, and engineering guidelines.

1.2 Intended Audience

This document is intended for personnel who:

Need to understand the features described herein

Work with Huawei products

1.3 Change History

This section provides information about the changes in different document versions. There are two types of changes, which are defined as follows:

Feature change

Changes in features of a specific product version

Editorial change

Changes in wording or addition of information that was not described in the earlier version

03 (2013-11-30)

This issue includes the following changes.

Change Type

Change Description Parameter Change

Feature change

None None

Editorial change

Optimized the figures of Figure 6-1 and Figure 6-2.

None

02 (2013-06-20)

This issue includes the following changes.

Change Type

Change Description Parameter Change

Feature change

None None

Editorial change

Added 6 Air-Interface Process Overlap

Added 7 Air-Interface Process Timeout

Added the processing of physical channel reconfiguration in 6 Air-Interface Process Overlap

None

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Call Reestablishment 1 About This Document



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01 (2012-11-30)

This document is created for RAN14.0.

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Call Reestablishment 2 Overview



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2 Overview

2.1 Introduction

Call reestablishment is a function by which radio links (RLs) are reestablished when a service interruption or an access failure occurs in temporary coverage holes and in tunnels, elevators, and buildings that cause significant signal quality fluctuation.

Call reestablishment can be initiated by a UE or the RAN.

Call reestablishment initiated by a UE: The UE sends a call reestablishment request to the network to restore services upon detecting a downlink RL failure or a signaling radio bearer (SRB) reset.

Call reestablishment initiated by the RAN: The RAN informs the UE to start call reestablishment upon detecting a service interruption or an access failure.

This document describes only call reestablishment initiated by the RAN.

2.2 Benefits

The RAN detects a service interruption or an access failure before a UE does and stops downlink power transmission to initiate call reestablishment. Call reestablishment improves user experience by increasing the radio access bearer (RAB) setup success rate and reducing the call drop rate.

2.3 Architecture

The possible causes of a service interruption or an access failure are as follows:

RL failure

SRB reset

Air-interface process overlap


PS TRB reset

These causes can impact the following processes: active set update, physical channel reconfiguration, RB setup, SRB reconfiguration during dynamic channel configuration control (DCCC), and measurement control.

Before releasing RLs due to the preceding causes in those processes, the RAN detects the service interruption or access failure and initiates call reestablishment, as shown in Figure 2-1.

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Figure 2-1 Causes and processes that trigger call reestablishment

RL failure can trigger call reestablishment even if the processes in Figure 2-1 are not active. RB reset, air-interface process overlap, TRB reset and air-interface process timeout must occur in one of the processes before call reestablishment is triggered.

Call reestablishment is controlled by service switch, process switch, and cause switch parameters. Enable the corresponding service switch before enabling a process switch or a cause switch.

Table 2-1 shows the signaling messages and causes for call reestablishment.

Table 2-1 Switch parameter mapping

Service Process Cause

CS services Active set update

SRB reset

RL failure

Measurement control SRB reset

Physical channel reconfiguration during a hard handover

SRB reset

RL failure

Physical channel reconfiguration in compressed mode

SRB reset

RL failure

Radio bearer reconfiguration SRB reset

RL failure

Air-interface process timeout


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Physical channel reconfiguration during a serving cell update

SRB reset

RL failure



Physical channel reconfiguration for inter RNC-UE timer relationship adjustment when a UE reports event 6G or 6F

SRB reset

RL failure



RB setup

SRB reset


PS services

Active set update

SRB reset

RL failure

Measurement control SRB reset

RL failure

RB setup

SRB reset


RB reconfiguration during DCCC

SRB reset



RL failure

PS TRB Reset None

Physical channel reconfiguration during a hard handover

SRB reset

RL failure


Physical channel reconfiguration in compressed mode

SRB reset

RL failure

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Physical channel reconfiguration during HSUPA power adjustment

SRB reset

RL failure



Physical channel reconfiguration for inter RNC-UE timer relationship adjustment when a UE reports event 6G or 6F

SRB reset

RL failure

Physical channel reconfiguration during a serving cell change

SRB reset

RL failure


The active set update and measurement control processes do not have process switch parameters.

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Call Reestablishment 3 Uplink RL Failure



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3 Uplink RL Failure

3.1 Uplink RL Failure Detection

The NodeB monitors uplink RL quality. If the number of "out-sync" indications received by the NodeB reaches the value of the NOUTSYNCIND parameter, the NodeB starts the TRlFailure timer. The detection process continues according to the situation:

If the number of "in-sync" indications received by the NodeB reaches the value of the NINSYNCIND parameter before the TRlFailure timer expires, the NodeB stops and resets the TRlFailure timer.

If the number of "in-sync" indications received by the NodeB does not reach the value of the NINSYNCIND parameter before the TRlFailure timer expires, the NodeB considers that an RL failure has occurred and identifies the RL set where the failure is located. (An RL set contains all the RLs of a UE under a NodeB.)

The higher the value of the NOUTSYNCIND parameter, the harder it will be for RL failures to be triggered. The higher the value of the NINSYNCIND parameter, the harder it will be for RLs to be synchronized. If either parameter is set to a high value, RLs will be on the verge of RL failure for a long time, and user experience will be poor for both CS and PS services. Set NOUTSYNCIND to a value less than the default and NINSYNCIND to a value higher than the default. This way, RL failures are easily triggered for call reestablishment to improve user experience.

The default value of NOUTSYNCIND is 50 and NINSYNCIND is 5.

When a UE's uplink RL sets are all out of synchronization, different events occur according to the situation:

If the call reestablishment feature is not enabled, the call drops or the UE access finally fails.

If the call reestablishment feature is enabled, the RNC activates a synchronization timer.

Table 3-1 shows the mapping between services, RsvdPara1:RSVDBIT1_BIT28 switch status, and synchronization timers.

Table 3-1 Mapping between services, RsvdPara1:RSVDBIT1_BIT28 switch status, and synchronization timers

Service RsvdPara1:RSVDBIT1_BIT28 Switch Status Synchronization Timer

CS services

Off RlRstrTmr

On T313

PS services

Off RlRstrTmr

On RlRstrTmr

If the NodeB does not detect uplink RL synchronization before the timer expires, call reestablishment is initiated.

Enable the RsvdPara1:RSVDBIT1_BIT28 switch for CS services so that uplink and downlink RLs are monitored by the

same synchronization timer.

When the RsvdPara1:RSVDBIT1_BIT28 switch is enabled, the synchronization timer used to initiate RL establishment is RlRstrTmr. The T313 timer is used only when the UE's RL sets are all out of synchronization.

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To enable the call reestablishment feature triggered by an RL failure, enable the corresponding service and cause switches listed in Table 3-2.

Table 3-2 Switches for call reestablishment triggered by an RL failure

Service Service Switch Process Switch Cause Switch

CS services RsvdPara1:RSVDBIT1_BIT24

Physical channel reconfiguration is controlled by

PROCESSSWITCH4:PHY_RECFG_REEST_SWITCH.

RB reconfiguration is controlled by

PROCESSSWITCH4:RB_RECFG_RL_REEST_SWITCH.

RsvdPara1:RSVDBIT1_BIT23

PS services RsvdPara1:RSVDBIT1_BIT25

RL failures can trigger call reestablishment without enabling process switches.

The service switch for CS+PS combined services is the same as that for CS services.

When call reestablishment is triggered for CS+PS combined services, calls are reestablished for both CS and PS services.

3.2 Call Reestablishment

3.2.1 Triggering

Call reestablishment triggered by an uplink RL failure can be performed under the same RNC or under different RNCs over the Iur interface.

Under the Same RNC

As mentioned in section 3.1 "Uplink RL Failure Detection", if the NodeB does not detect uplink RL synchronization before the RlRstrTmr or T313 timer expires, the RNC sends to the NodeB the Radio Link Activation Command message containing the information element (IE) "deactivate." Upon receiving the message, the NodeB stops downlink power transmission for the UE's RL sets. Then, the RNC starts the timer for call reestablishment (RsvdPara2 timer for CS services and RsvdPara3 timer for PS services).

If the RNC does not receive the Cell Update message from the UE before the timer expires, the call drops or UE access fails.

If the RNC receives the Cell Update message from the UE before the timer expires, the RNC stops the timer and initiates call reestablishment.

Figure 3-1 shows the signaling procedure for call reestablishment triggered by an uplink RL failure under the same RNC.


../RNCParaHtml/mbsc/m-para/urrctrlswitch_processswitch4.html








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Figure 3-1 Call reestablishment triggered by an uplink RL failure under the same RNC

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Under Different RNCs over the Iur Interface

Call reestablishment under different RNCs is controlled by the PROCESSSWITCH4:.IUR_RL_REEST_SWITCH.

Figure 3-2 shows the signaling procedure for call reestablishment triggered by an uplink RL failure under different RNCs over the Iur interface.


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Figure 3-2 Call reestablishment triggered by an uplink RL failure under different RNCs over the Iur interface

The difference between call reestablishment triggered by an uplink RL failure under the same RNC and that triggered by an uplink RL failure under different RNCs is summarized as follows:

In the former process, the RNC sends the Radio Link Activation Command to the NodeB.

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In the latter process, the SRNC sends the Radio Link Deletion Request message to the DRNC, and upon receiving the Radio Link Deletion Response message from the NodeB, the DRNC waits for the UE's Cell Update message.

3.2.2 Implementation

The call reestablishment process is implemented as follows:

1. After the NodeB stops downlink power transmission for a UE's RLs, the UE starts the T313 timer if the number of "out-sync" indications received consecutively from Layer 1 reaches the value of the N313 parameter.

The higher the value of the N313 parameter, the harder it will be for the UE to detect an RL failure and the longer the UE stays on the verge of RL failure.

2. If the number of "in-sync" indications received consecutively from Layer 1 does not reach the value of the N315 parameter before the T313 timer expires, the UE transmits the Cell Update message with the cause value "Radio Link Failure" to the RNC for call reestablishment. Meanwhile, the UE starts the T302 timer as well as the T314 timer for CS services or the T315 timer for PS services.

3. If the UE does not receive the Cell Update Confirm message from the RAN side after the T302 timer expires, the UE retransmits the Cell Update message until the T314/T315 timer expires: (The number of retransmissions is determined by the value of the N302 parameter.)

If faulty RLs are restored before T314/T315 expires, the call reestablishment is successful. Interrupted services are restored or UE access succeeds.

If faulty RLs are not restored before T314/T315 expires, the call reestablishment fails. Services are released or UE access fails.

Set the T313, N313, N315, and T314 parameters appropriately so that UEs can quickly detect RL failures.

Figure 3-3 shows how call establishment is implemented.

../RNCParaHtml/mbsc/m-para/uconnmodetimer_n313.html


















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Figure 3-3 Flowchart for call reestablishment

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Call Reestablishment 4 SRB Reset



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4 SRB Reset

Figure 4-1 shows the signaling procedure for call reestablishment triggered by an SRB reset.

Figure 4-1 Call reestablishment triggered by an SRB reset

4.1 SRB Reset Detection

The RNC sends a message in acknowledged mode (AM) to a UE. However, the RNC does not receive a response from the UE before the number of SRB RLC PDU retransmissions reaches the value of the

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NoDiscardMaxDAT parameter. If the AMRlcDiscardMode parameter is set to NO_DISCARD, the RNC triggers an SRB reset and sends the Reset PDU message to the UE to reestablish RLC entities on both sides. Then one of the following occurs:

If the call reestablishment feature is not enabled, the RNC sends the Iu Release Request message to the core network.

If the call reestablishment feature is enabled, call reestablishment is triggered.

To enable the call reestablishment feature triggered by an SRB reset, enable the corresponding service, process, and cause switches listed in Table 4-1.

Table 4-1 Switches for call reestablishment triggered by an SRB reset

Service Service Switch Process Cause Switch

CS services


Physical channel reconfiguration is controlled by PROCESSSWITCH4:PHY_RECFG_REEST_SWITCH.

RB setup is controlled by PROCESSSWITCH4:RB_SETUP_RL_REEST_SWITCH.

RB reconfiguration is controlled by ReservedSwitch1:RESERVED_SWITCH_1_BIT14.

NOTE

RB reconfiguration applies to a single PS service or to services combined with a PS service.


PS services




After you enable the process switch, change the length of the corresponding process timer so that call reestablishment is more likely to be triggered by an SRB reset. Table 4-2 shows the mapping between processes and timers.

Table 4-2 Mapping between processes and timers

Process Timer

Active set update HoAsuTmr

Physical channel reconfiguration HoPhychRecfgTmr

RB setup RbSetupRspTmr

SRB reconfiguration during dynamic channel configuration control (DCCC)

RbRecfgRspTmr

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The process of call reestablishment triggered by an SRB reset is the same as that triggered by an RL failure. For details, see section 3.2 "Call Reestablishment."

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Call Reestablishment 5 TRB Reset



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5 TRB Reset

Figure 5-1 shows the signaling procedure for call reestablishment triggered by a TRB reset.

Figure 5-1 Call reestablishment triggered by a TRB reset

5.2 TRB Reset Detection

The RNC sends an AM PDU to a UE initiating PS services in the CELL_DCH state. If the RNC does not receive a response from the UE, a TRB reset is triggered. Then one of the following occurs:

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Call Reestablishment 5 TRB Reset



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If the call reestablishment feature is not enabled, the RNC sends the Iu Release Request message to the core network and the UE's PS services are interrupted.

If the call reestablishment feature is enabled, the RNC does not send the Iu Release Request message to the core network and call reestablishment is triggered. After the call reestablishment, the UE is still in the CELL_DCH state.

To enable the call reestablishment feature in this scenario, enable the service and process switches listed in the following table.

Table 5-1 Switches for call reestablishment triggered by a TRB reset

Service Switch Process Switch Cause Switch

The PS service is controlled by RsvdPara1:RSVDBIT1_BIT25 in the SET URRCTRLSWITCH command. When RsvdPara1 is set to RSVDBIT1_BIT25-0, the switch for PS service is enabled.

PDU sending is controlled by SET UCORRMPARA:ReservedSwitch1: RESERVED_SWITCH_1_BIT26

None

Call reestablishment triggered by a TRB reset applies only to a single PS service of a UE in the CELL_DCH state.


The process of call reestablishment triggered by a TRB reset is the same as that triggered by an RL failure. For details, see 3.2 Call Reestablishment.





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Call Reestablishment 6 Air-Interface Process Overlap



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6 Air-Interface Process Overlap

Air-interface process overlap occurs in the following scenarios:

Scenario 1: The RNC sends the Radio Bearer Setup or Radio Bearer Reconfiguration or Physical Channel Reconfiguratio message to a UE. If the RNC does not receive a response from the UE before the RlRstrTmr or T313 timer expires, the RNC initiates call reestablishment for the UE.

Scenario 2: After sending the Radio Bearer Setup or Radio Bearer Reconfiguration message or Physical Channel Reconfiguratio to a UE, the RNC receives the Cell Update message containing the cause value "Radio Link Failure" or “Rlc_Unrecoverable_Error”from the UE.

If the RNC receives the Cell Update message containing the cause value "RLC Unrecoverable Error" from the UE, only the RsvdPara1:RSVDBIT1_BIT26 switch needs to be enabled to perform call reestablishment.

6.1 Air-Interface Process Overlap Detection

6.1.1 Scenario 1

The RNC sends the Radio Bearer Setup or Radio Bearer Reconfiguration message or Physical Channel Reconfiguration to a UE. If the RNC does not receive a response from the UE before the RlRstrTmr or T313 timer expires, the RNC initiates call reestablishment for the UE. Figure 6-1 shows the procedure for scenario 1.

For details about whether to use RlRstrTmr or T313, see section 3.1 "Uplink RL Failure Detection."








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Figure 6-1 Call reestablishment triggered by air-interface process overlap in scenario 1

To enable the call reestablishment feature for scenario 1, enable the corresponding service, process, and cause switches listed in Table 6-1 and Table 6-2.

Table 6-1 lists the switches for call reestablishment triggered when the RNC does not receive ACK of the Radio Bearer Setup message from the UE.

Table 6-1 Switches for call reestablishment triggered when the RNC does not receive ACK of the Radio Bearer Setup message from the UE

Service Service Switch Process Process Switch Cause Switch

CS services RsvdPara1:RSVDBIT1_BIT24

RB setup PROCESSSWITCH4:RB_SETUP_R






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L_REEST_SWITCH



Table 6-2 lists the switches for call reestablishment triggered when the RNC does not receive ACK of the Radio Bearer Reconfiguration message from the UE.

Table 6-2 Switches for call reestablishment triggered when the RNC does not receive ACK of the Radio Bearer Reconfiguration message from the UE

Service Service Switch

Process Process Switch Cause Switch

Single PS service


RB reconfiguration ReservedSwitch1:RESERVED_SWITCH_1_BIT14


CS+PS combined services




The following table lists the switches for call reestablishment triggered when the RNC does not receive ACK of the Physical Channel Reconfiguration Complete message for a single PS service.

Table 6-3 Switches for call reestablishment triggered when the RNC does not receive ACK of Physical Channel Reconfiguration Complete message for a single PS service



The PHY_RECFG_REEST_SWITCH under the PROCESSSWITCH4 parameter controls whether call reestablishment can be triggered when physical channel reconfiguration overlaps cell update.


The following table lists the switches for call reestablishment triggered when the RNC does not receive ACK of the Physical Channel Reconfiguration Complete message for CS+PS combined services.









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Table 6-4 Switches for call reestablishment triggered when the UE does not send the RNC a Physical Channel Reconfiguration Complete message for CS+PS combined service


CS+PS combined services


The PHY_RECFG_REEST_SWITCH under the PROCESSSWITCH4 parameter controls whether call reestablishment can be triggered when physical channel reconfiguration overlaps cell update.




6.1.2 Scenario 2

After sending the Radio Bearer Setup or Radio Bearer Reconfiguration message to a UE, the RNC receives the Cell Update message containing the cause value "Radio Link Failure" or “RLC Unrecoverable error” from the UE. Then one of the following occurs:

If the call reestablishment feature is not enabled, the call drops or UE access fails.

If the call reestablishment feature is enabled, the RNC initiates call reestablishment, as shown in Figure 6-2.




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Figure 6-2 Call reestablishment triggered by air-interface process overlap in scenario 2

The RNC does not send the Radio Link Activation Command message containing the "deactivate" IE to the NodeB. Therefore, the NodeB does not stop downlink power transmission for the UE's RL sets. Instead, the RNC initiates call reestablishment upon receiving the Cell Update message from the UE.

To enable the call reestablishment feature for scenario 2, enable the corresponding service, process, and cause switches listed in Table 6-5 and Table 6-6.

Table 6-5 lists the switches for call reestablishment triggered when the RNC does not receive ACK of the Radio Bearer Setup message from the UE in scenario 2.

Table 6-5 Switches for call reestablishment triggered when the RNC does not receive ACK of the Radio Bearer Setup message from the UE


RB setup PROCESSSWITCH4:RB_SETUP_RL_REEST_SWITCH None



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Table 6-6 lists the switches for call reestablishment triggered when the RNC does not receive ACK of the Radio Bearer Reconfiguration message from the UE in scenario 2.

Table 6-6 Switches for call reestablishment triggered when the RNC does not receive ACK of the Radio Bearer Reconfiguration message from the UE (PS or CS+PS)


RB reconfiguration ReservedSwitch1:RESERVED_SWITCH_1_BIT14 and SET UCORRMPARA: ReservedSwitch1: RESERVED_SWITCH_1_BIT20

None


Table 6-7 Switches for call reestablishment triggered when the RNC does not receive ACK of the Physical Channel Reconfiguration message from the UE (PS or CS+PS)


Physical Channel Reconfiguration

ProcessSwitch4: PHY_RECFG_REEST_SWITCH and SET UCORRMPARA: ReservedSwitch1: RESERVED_SWITCH_1_BIT19

None



The process of call reestablishment triggered by process overlap is the same as that triggered by an RL failure. For details, see section 3.2 "Call Reestablishment."





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Call Reestablishment 7 Air-Interface Process Timeout



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7 Air-Interface Process Timeout

7.1 Air-Interface Process Timeout Detection

7.1.1 Radio Bearer Setup Timeout

The RNC sends the Radio Bearer Setup message to a UE. However, the RNC does not receive the Radio Bearer Setup Complete message from the UE before the RbSetupRspTmr timer expires. Then either of the following occurs:

If the call reestablishment feature is not enabled, the RNC sends the Iu Release Request message to the core network and the call drops.

If the call reestablishment feature is enabled, the RNC does not send the Iu Release Request message to the core network but initiates call reestablishment, as shown in the following figure.

Figure 7-1 Call reestablishment triggered by radio bearer setup timeout in scenario 1

In this scenario, the call reestablishment feature is controlled by the service switch and process switch, as described in the following table.

Table 7-1 Switches for call reestablishment triggered by radio bearer setup timeout


The CS service is controlled by RsvdPara1:RSVDBIT1_BIT24 in the SET URRCTRLSWITCH command. When RsvdPara1 is set to

RB setup is controlled by SET UCORRMPARA: ReservedSwitch1:RESERVED_SWITCH_1_BIT14 and SET UCORRMPARA:ReservedSwitch1=

None






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RSVDBIT1_BIT24-0, the switch for CS service is enabled.

RESERVED_SWITCH_1_BIT20.



7.1.2 Physical Channel Reconfiguration Timeout

After sending a Physical Channel Reconfiguration message to a UE, the RNC starts a timer whose length is determined by the HoPhychRecfgTmr parameter that applies to the UMTS BSC6900. If the RNC does not receive a Physical Channel Reconfiguration Complete message from the UE before the timer expires, physical channel reconfiguration timeout occurs. Then either of the following occurs:

If the call reestablishment feature is not enabled, the RNC sends an Iu Release Request message to the core network and the call drops.

If the call reestablishment feature is enabled, the RNC does not send an Iu Release Request message to the core network but initiates call reestablishment, as shown in the following figure.




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Figure 7-2 Call reestablishment triggered by physical channel reconfiguration timeout

The following table lists the switches for call reestablishment triggered by physical channel reconfiguration timeout.

Table 7-2 Switches for call reestablishment triggered by physical channel reconfiguration timeout


The CS service is controlled by RsvdPara1:RSVDBIT1_BIT24 in the SET URRCTRLSWITCH command. When RsvdPara1 is set to RSVDBIT1_BIT24-0, the switch for CS service is enabled.

The PHY_RECFG_REEST_SWITCH under the PROCESSSWITCH4 parameter and SET CORRMPARA :ReservedSwitch1: RESERVED_SWITCH_1_BIT19 control whether call reestablishment can be triggered by physical channel reconfiguration timeout. Call reestablishment can be triggered by physical channel reconfiguration timeout only when these two switches are turned on.

None








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The process of call reestablishment triggered by process overlap is the same as that triggered by an RL failure. For details, see section 3.2 "Call Reestablishment."

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Call Reestablishment 8 Related Features



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8 Related Features

8.1 Prerequisite Features

None

8.2 Mutually Exclusive Features

None

8.3 Impacted Features

None

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Call Reestablishment 9 Network Impact



30

9 Network Impact

9.1 System Capacity

None

9.2 Network Performance

When the call reestablishment feature is enabled in scenarios with weak coverage or significant signal fluctuation, calls will be reestablished for UEs with service interruptions or access failures that are caused by link failures or control/user plane faults. As a result, the call drop rate decreases and the UE access success rate increases. The exact gains depend on the coverage of the live network.

When a UE service is interrupted or the UE access fails, channel element (CE), code resources, and power resources are released for the UE. After call reestablishment succeeds, the released resources are re-occupied by the UE.

The call reestablishment feature:

Generally interrupts CS services for at least 8 seconds

Does not affect network KPIs

Affects CS user experience

Slightly affects non-real-time PS user experience

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Call Reestablishment 10 Implementation



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10 Implementation

10.1 When to Use Call Reestablishment

Use call reestablishment in temporary coverage holes and in tunnels, elevators, and buildings that cause significant radio signal fluctuation.

10.2 Required Information

Before you enable this function, collect the following information:

Causes of call drops or access failures and the number and proportion of times that UEs are involved in the processes performed over the air interface

Whether the Iur interface is configured with and supports common channels

To support the call reestablishment feature under different RNCs, the Iur interface must support common channels.

10.3 Planning

None

10.4 Deploying Call Reestablishment

10.4.1 Requirements

None

10.4.2 Data Preparation

Parameter Name

Parameter ID Remarks Data Source

Timer 302 T302 Set this parameter based on network conditions. Otherwise, network performance will be greatly affected. The recommended value is 2s.

Radio network plan (internal)

Constant 302 N302 Set this parameter based on network conditions. Otherwise, network performance will be greatly affected. The recommended value is 3.



Default value/recommended value

Constant 313 N313 Set this parameter based on network conditions. Otherwise, network performance will be greatly affected. The higher the value of this parameter, the harder it will be for the UE to detect an RL failure and the longer the UE stays on the verge of RL failure. The recommended value is 20.






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Parameter Name


Constant 315 N315 Set this parameter based on network conditions. Otherwise, network performance will be greatly affected. The recommended value is 1.






Num of Continuous Out of Sync Ind

NoutsyncInd Set this parameter based on network conditions. Otherwise, network performance will be greatly affected. The lower the value of this parameter, the earlier call reestablishment is triggered by an RL failure. The recommended value is 50, but you can set this parameter to a value even lower than the recommended value to improve user experience.


Num of Continuous in Sync Ind

NInsyncInd Set this parameter based on network conditions. Otherwise, network performance will be greatly affected. The higher the value of this parameter, the earlier call reestablishment is triggered by an RL failure. The recommended value is 5, but you can set this parameter to a value even higher than the recommended value to improve user experience.


Radio Link Failure Timer Length

TRlFailure Set this parameter based on network conditions. Otherwise, network performance will be greatly affected. The recommended value is 5s.


Reserved parameter 2

RsvdPara2 Timer for call reestablishment for CS services.

Set this parameter based on network conditions. Otherwise, network performance will be greatly affected. The recommended value is 15000.



RsvdPara3 Timer for call reestablishment for PS services.

Set this parameter based on network conditions. Otherwise, network performance will be greatly affected. The recommended value is 35000.










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Parameter Name




Switch that controls call reestablishment triggered by SRB resets

Determine whether to enable this switch by referring to section 10.2 "Required Information."




Switch that controls call reestablishment caused by RL failures. Determine whether to enable this switch by referring to section 10.2 "Required Information."


CORRM Algorithm Reserved Switch 1

ReservedSwitch1:RESERVED_SWITCH_1_BIT14

Switch that controls call reestablishment caused by RB reconfiguration during DCCC.



Process Control Switch 4

PROCESSSWITCH4:RB_SETUP_RL_REEST_SWITCH

Switch that controls call reestablishment caused by process overlap.




PROCESSSWITCH4:PHY_RECFG_REEST_SWITCH

Switch that controls call reestablishment caused by physical channel reconfiguration.





Switch that controls call reestablishment caused by RB reconfiguration (DCCC)





Switch that controls call reestablishment caused by physical channel reconfiguration.





Switch that controls call reestablishment caused by PS TRB reset.

















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Parameter Name




Switch that controls call reestablishment for CS services.





Switch that controls call reestablishment for PS services.




PROCESSSWITCH4:IUR_RL_REEST_SWITCH

Switch that controls call reestablishment under different RNCs.





Switch that controls call reestablishment triggered when T313 expires after an RL failure.



Wait RB setup response timer

RbSetupRspTmr Set this parameter to 10s if PROCESSSWITCH4:RB_SETUP_RL_REEST_SWITCH is enabled.


Wait RB reconfiguration response timer

RbRecfgRspTmr Set this parameter to 10s if ReservedSwitch1:RESERVED_SWITCH_1_BIT14 is enabled.


HO active set update response timer

HoAsuTmr Set this parameter to 10s. Radio network plan (internal)

HO PhyCh reconfiguration timer

HoPhychRecfgTmr

Set this parameter to 10s if PROCESSSWITCH4:PHY_RECFG_REEST_SWITCH is enabled.


10.4.3 Function Activation

Step 1 Set the following parameters appropriately:

1. Run the SET UCONNMODETIMER command to set Timer 302, Constant 302, Timer 313, Constant 313, Timer 314, Constant 315, and Timer 315.

2. Run the MOD UCELL command to set Num of Continuous in Sync Ind, Num of Continuous Out of Sync Ind, and Radio Link Failure Timer Length.















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3. Run the SET UCACALGOSWITCH command to set Reserved parameter 2 and Reserved parameter 3.

4. Run the SET URRCTRLSWITCH command to set Reserved parameter 1 to RSVDBIT1_BIT28.

Step 2 Enable the switches that control the call reestablishment feature for CS and PS services.

1. Run the SET URRCTRLSWITCH command and select RSVDBIT1_BIT24 and RSVDBIT1_BIT25 under Reserved parameter 1.

Step 3 Enable the switches that control the call reestablishment feature triggered by RL failures and SRB resets.

1. Run the SET URRCTRLSWITCH command and select RSVDBIT1_BIT22 and RSVDBIT1_BIT23 under Reserved parameter 1.

Step 4 Set the timer for the Active Set Update process.

1. Run the SET USTATETIMER command to set HO active set update response timer.

Step 5 Enable the switch that controls the call reestablishment feature triggered by physical channel reconfiguration.

1. Run the SET URRCTRLSWITCH command and select PHY_RECFG_REEST_SWITCH under Process Control Switch 4.

2. Run the SET USTATETIMER command to set HO PhyCh reconfiguration timer.

Step 6 Enable the switch that controls the call reestablishment feature triggered by RB setup.

1. Run the SET URRCTRLSWITCH command and select RB_SETUP_RL_REEST_SWITCH under Process Control Switch 4.

2. Run the SET USTATETIMER command to set Wait RB setup response timer.

Step 7 Enable the switch that controls the call reestablishment feature triggered by RB reconfiguration.

1. Run the SET UCORRMPARA command and select RESERVED_SWITCH_1_BIT14 under CORRM Algorithm Reserved Switch 1.

2. Run the SET USTATETIMER command to set Wait RB reconfiguration response timer.

Step 8 Enable the switch that controls the call reestablishment feature under different RNCs.

Run the SET URRCTRLSWITCH command and select IUR_RL_REEST_SWITCH under Process Control Switch 4.

Step 9 Enable the switch that controls the call reestablishment feature triggered by RB reconfiguration

Run the SET UCORRMPARA command and select RESERVED_SWITCH_1_BIT20 under CORRM Algorithm Reserved Switch 1.

Step 10 Enable the switch that controls the call reestablishment feature triggered by physical channel reconfiguration


Step 11 Enable the switch that controls the call reestablishment feature triggered by PS TRB rreset


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----End

10.4.4 MML Command Example

SET UCONNMODETIMER: T302=D1400, N302=3, T313=3, N313=D20, T314=D12, T315=D10, N315=D20;

MOD UCELL: CellId=01, NInsyncInd=8, NOutsyncInd=8;

SET UCACALGOSWITCH: RsvdPara2=15000, RsvdPara3=30000;

SET URRCTRLSWITCH: PROCESSSWITCH4=PHY_RECFG_REEST_SWITCH-1&

IUR_RL_REEST_SWITCH-1&RB_SETUP_RL_REEST_SWITCH-1,

RsvdPara1=RSVDBIT1_BIT22-0&RSVDBIT1_BIT23-0&RSVDBIT1_BIT24-0&RSVDBIT1_BIT25-0&RSVDBIT1_BIT28-0;

SET UCORRMPARA: ReservedSwitch1=RESERVED_SWITCH_1_BIT14-1;




SET USTATETIMER: HoAsuTmr=10000,RbSetupRspTmr=10000, RbRecfgRspTmr =10000,HoPhychRecfgTmr=10000;

10.4.5 Activation Observation

In call reestablishment triggered under the same RNC, track the IOS signaling according to Figure 3-1. If the NBAP_RL_ACT_CMD message can be tracked, the call reestablishment feature is enabled on the live network.

In call reestablishment triggered under different RNCs, track the IOS signaling according to Figure 3-2. If the RNSAP_RL_DEL_REQ message can be tracked, the call reestablishment feature is enabled on the live network.

10.4.6 Deactivation

Step 1 Disable the switches that control the call reestablishment feature for CS and PS services.

Run the SET URRCTRLSWITCH command and clear RSVDBIT1_BIT24 and RSVDBIT1_BIT25 under Reserved parameter 1.

Step 2 Disable the switches that control the call reestablishment feature triggered by RL failures and SRB resets.

Run the SET URRCTRLSWITCH command and clear RSVDBIT1_BIT22 and RSVDBIT1_BIT23 under Reserved parameter 1.

Step 3 Disable the switch that controls the call reestablishment feature triggered by physical channel reconfiguration.

Run the SET URRCTRLSWITCH command and clear PHY_RECFG_REEST_SWITCH under Process Control Switch 4.

Step 4 Disable the switch that controls the call reestablishment feature triggered by RB setup.

Run the SET URRCTRLSWITCH command and clear RB_SETUP_RL_REEST_SWITCH under Process Control Switch 4.

Step 5 Disable the switch that controls the call reestablishment feature triggered by RB reconfiguration.

Run the SET UCORRMPARA command and clear RESERVED_SWITCH_1_BIT14 under CORRM Algorithm Reserved Switch 1.

Step 6 Disable the switch that controls the call reestablishment feature triggered by RB reconfiguration


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Step 7 Disable the switch that controls the call reestablishment feature triggered by physical channel reconfiguration


Step 8 Disable the switch that controls the call reestablishment feature triggered by PS TRB rreset


Step 9 Disable the switch that controls the call reestablishment feature under different RNCs.

Run the SET URRCTRLSWITCH command and clear IUR_RL_REEST_SWITCH under Process Control Switch 4.

Step 10 Run the SET URRCTRLSWITCH command and clear RSVDBIT1_BIT28 under Reserved parameter 1.

Step 11 (Optional) Set the following parameters to the values they were before the function was enabled:

1. Run the SET UCONNMODETIMER command to reset the following parameters to their original values: Timer 302, Constant 302, Timer 313, Constant 313, Timer 314, Constant 315, and Timer 315.

2. Run the MOD UCELL command to reset the following parameters to their original values: Num of Continuous in Sync Ind, Num of Continuous Out of Sync Ind, and Radio Link Failure Timer Length.

3. Run the SET UCACALGOSWITCH command to reset Reserved parameter 2 and Reserved parameter 3 to their original values.

4. Run the SET USTATETIMER to reset the following parameters to their original values: HO active set update response timer, HO PhyCh reconfiguration timer, Wait RB setup response timer, and Wait RB reconfiguration response timer.

----End

10.4.7 MML Command Example

// Deactivating call reestablishment

SET URRCTRLSWITCH: PROCESSSWITCH4=PHY_RECFG_REEST_SWITCH-0&

RB_REL_RL_REEST_SWITCH-0&IUR_RL_REEST_SWITCH-0&RB_SETUP_RL_REEST_SWITCH-0,

RsvdPara1=RSVDBIT1_BIT22-1&RSVDBIT1_BIT23-1&RSVDBIT1_BIT24-1&RSVDBIT1_BIT25-1&RSVDBIT1_BIT28-1;





NOTE

When you deactivate the call reestablishment feature, change the values of the following parameters back to their settings before this function was activated: T302, N302, T313, N313, N315, T314(CS), T315(PS), NinsyncInd, NoutsyncInd, TRlFailure, RsvdPara2(CS), RsvdPara3(PS), RbSetupRspTmr, RbRecfgRspTmr, HoAsuTmr and HoPhychRecfgTmr. Otherwise, network performance will be greatly affected.

10.5 Performance Monitoring

After the call reestablishment feature is enabled for CS services, observe the following KPIs:

















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Call drop rate: [VS.RAB.AbnormRel.AMR/(VS.RAB.AbnormRel.AMR + VS.RAB.NormRel.AMR)] x 100%

RAB setup success rate: [(VS.RAB.SuccEstabCS.AMR/VS.RAB.AttEstab.AMR)] x 100%

After the call reestablishment feature is enabled, the preceding KPIs should be improved or the same as those before the function was enabled. If the KPIs deteriorated, optimize them.

After the call reestablishment feature is enabled for PS services, observe the following KPIs:

Call drop rate: [VS.RAB.AbnormRel.PS/(VS.RAB.AbnormRel.PS + VS.RAB.NormRel.PS)] x 100%

RAB setup success rate: [(VS.RAB.SuccEstabPS.Conv+VS.RAB.SuccEstabPS.Str +VS.RAB.SuccEstabPS.Int +VS.RAB.SuccEstabPS.Bkg)/(VS.RAB.AttEstabPS.Conv+VS.RAB.AttEstabPS.Str+VS.RAB.AttEstabPS.Int +VS.RAB.AttEstabPS.Bkg)]x100%

After the call reestablishment feature is enabled, the preceding KPIs should be improved or the same as those before the function was enabled. If the KPIs deteriorated, optimize them.

10.6 Parameter Optimization

To strike a balance between KPIs and user experience, modify the following parameters based on network conditions: T302, N302, T313, N313, N315, T314(CS), T315(PS), NinsyncInd, NoutsyncInd, TRlFailure, RsvdPara2 (CS), and RsvdPara3 (PS). Because parameter modification greatly affects network performance, contact Huawei technical support personnel before you modify the parameters.

10.7 Troubleshooting

None













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Call Reestablishment 11 Parameters



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11 Parameters

Table 11-1 Parameter description

Parameter ID

NE MML Command

Feature ID Feature Name Description

AMRlcDiscardMode

BSC6900

ADD UTYPSRBRLC

MOD UTYPSRBRLC

WRFD-020900 Logical Channel Management

Meaning:This parameter specifies whether the AM RLC entity discards the Service Data Units (SDUs) that need to be sent and the discard mode. This parameter is applicable only in the RLC AM mode.

- If this parameter is set to TIMER_BASED_WITH_EXPLICIT_SIGNALLING, "ExplicitTimerDiscard" is required for triggering SDU discard. If the transmission time exceeds a preset value, the TX end discards this SDU. At the same time, it sends a Move Receiving Window (MRW) command to the RX end, indicating the discard, to update the RX window. In this mode, "ExplicitTimerMRW", "ExplicitTimerDiscard", and "ExplicitMaxMRW" need to be set.

- If this parameter is set to DISCARD_AFTER_MAX_DAT_RETRANSMISSIONS, "MaxDAT" is required for triggering SDU discard. If the number of transmissions of a PDU exceeds a preset value, the TX end discards the corresponding SDU. At the same time, it sends an MRW command to the RX end, indicating this discard, to update the RX window. In this mode, "MaxDAT", "TimerMRW", and "MaxMRW" need to be set.

- If this parameter is set to NO_DISCARD, the TX end does not discard any SDU. If the number of transmissions of a PDU exceeds a preset value, the AM RLC entity will be reset. In this mode,




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Parameter ID

NE MML Command


"NoDiscardMaxDAT" needs to be set.

For details of this parameter, refer to the 3GPP TS 25.322.

This parameter is an advanced parameter. To modify this parameter, contact Huawei Customer Service Center for technical support.

GUI Value Range:TIMER_BASED_WITH_EXPLICIT_SIGNALLING, DISCARD_AFTER_MAX_DAT_RETRANSMISSIONS, NO_DISCARD

Actual Value Range:TIMER_BASED_WITH_EXPLICIT_SIGNALLING, DISCARD_AFTER_MAX_DAT_RETRANSMISSIONS, NO_DISCARD

Unit:None

Default Value:None

HoAsuTmr

BSC6900

SET USTATETIMER

WRFD-020202

WRFD-020203

Intra RNC Soft Handover

Inter RNC Soft Handover

Meaning:A timer to RNC wait for the response to active set update in soft handover procedure.

Note: The value range of "HoAsuTmr" is 1 to 300000 in the current version. In a later version, the value range changes into 100 to 300000. In the current version, if you enter a value within the range of 1 to 100 including 1, this value can still be synchronized and issued but the system regards the value as 5000, the recommended value. Therefore, you are advised not to enter a value smaller than 100.

GUI Value Range:1~300000

Actual Value Range:1~300000



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Parameter ID

NE MML Command


Unit:ms

Default Value:5000

HoPhychRecfgTmr

BSC6900

SET USTATETIMER

WRFD-020302

WRFD-020304

WRFD-020301

Inter Frequency Hard Handover Based on Coverage

Inter Frequency Hard Handover Based on DL QoS

Intra Frequency Hard Handover

Meaning:A timer to RNC wait for the response to physical channel reconfiguration in hard handover procedure.

Note: The value range of "HoPhychRecfgTmr" is 1 to 300000 in the current version. In a later version, the value range changes into 100 to 300000. In the current version, if you enter a value within the range of 1 to 100 including 1, this value can still be synchronized and issued but the system regards the value as 5000, the recommended value. Therefore, you are advised not to enter a value smaller than 100.



Unit:ms

Default Value:5000

N302 BSC6900

SET UCONNMODETIMER

WRFD-010101 3GPP R9 Specifications Meaning:Maximum number of retransmissions of CELL UPDATE/URA UPDATE.Protocol default value is 3.

GUI Value Range:0~7


Unit:None

Default Value:3

N313 BSC6900

SET UCONNMODETIMER

WRFD-010101 3GPP R9 Specifications Meaning:Maximum number of successive "out of sync" indications received from L1. Protocol default value is 20.

GUI Value Range:D1, D2, D4, D10, D20, D50, D100, D200








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Parameter ID

NE MML Command


Actual Value Range:1, 2, 4, 10, 20, 50, 100, 200

Unit:None

Default Value:D50

N315 BSC6900

SET UCONNMODETIMER

WRFD-010101 3GPP R9 Specifications Meaning:Maximum number of successive "in sync" indications received from L1 when T313 is activated. Protocol default value is 1.

GUI Value Range:D1, D2, D4, D10, D20, D50, D100, D200, D400, D600, D800, D1000

Actual Value Range:1, 2, 4, 10, 20, 50, 100, 200, 400, 600, 800, 1000

Unit:None

Default Value:D1

NInsyncInd

BSC6900

ADD UCELLSETUP

WRFD-022000 Physical Channel Management

Meaning:This parameter defines the times of successive in-sync indications required for the NodeB to trigger the radio link recovery process.The radio link set remains in the initial state until it has received a certain number (the number is defined by NInsyncInd) of successive in-sync indications from L1, and then the NodeB triggers the radio link recovery process, which indicates that the radio link set has been synchronized. Once the radio link recovery process is triggered, the radio link set is considered to be in the synchronized state. In the radio link maintenance process, NInsyncInd is used together with the successive out-of-sync indication counter.



Unit:None







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Parameter ID

NE MML Command


Default Value:5

NoDiscardMaxDAT

BSC6900

ADD UTYPSRBRLC

MOD UTYPSRBRLC

WRFD-020900 Logical Channel Management

Meaning:This parameter is applicable to only the AM RLC entity whose "AMRlcDiscardMode" is set to NO_DISCARD. This parameter specifies the maximum number of transmissions of a PDU before the RLC entity is reset. When the mode is set to NO_DISCARD, the RLC entity will be directly reset if the number of retransmissions of a PDU reaches the value defined by this parameter. The number of retransmissions at the RLC layer increases when the Uu interface signal quality deteriorates. In this situation, set the parameter to a large value. For details of this parameter, refer to the 3GPP TS 25.322.


GUI Value Range:D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D15, D20, D25, D30, D35, D40

Actual Value Range:1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 35, 40

Unit:None

Default Value:None

NOutsyncInd

BSC6900

ADD UCELLSETUP


Meaning:This parameter defines the times of successive in-sync indications required for starting the radio link failure timer. When the radio link set is in the synchronized state, the NodeB starts the timer after it receives successive out-of-sync indications of the number defined by NOutsyncInd.The















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Parameter ID

NE MML Command


NodeB shall stop and reset the timer after receiving successive in-sync indications of the number defined by NInsyncInd.When the timer expires, the NodeB triggers the radio link failure process, and indicates which radio link set is out-of-sync.



Unit:None

Default Value:50

PROCESSSWITCH4

BSC6900

SET URRCTRLSWITCH

WRFD-020302

WRFD-010510

WRFD-140205

WRFD-020304

Inter Frequency Hard Handover Based on Coverage

3.4/6.8/13.6/27.2Kbps RRC Connection and Radio Access Bearer Establishment and Release

Voice Service Experience Improvement for Weak Reception Ues

Inter Frequency Hard Handover Based on DL QoS

Meaning:1) AMR_HHO_FAIL_ROLLBACK_SWITCH (Hard Handover Failure Rollback Switch for CS AMR Speech Services)

When this switch is turned on, the BSC6900 supports rollback caused by failed hard handovers of CS AMR speech services. It is recommended that the timer T312 be set to 1 second (SET UCONNMODETIMER: T312=1;) before turning on this switch. If the timer T312 is not set to 1 second, AMR noise will occur on some UEs.

When this switch is turned off, the BSC6900 does not support rollback caused by failed hard handovers of CS AMR speech services, leading to call drops.

2) RRC_CONN_SETUP_OPT_SWITCH (RRC CONNECTION SETUP Message Optimization Switch)

Whether optimization of the RRC CONNECTION SETUP message takes effect.

When this switch is turned on, optimization of the RRC




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Parameter ID

NE MML Command


CONNECTION SETUP message takes effect. If the IE RLC info under SRB3 or SRB4 in the RRC CONNECTION SETUP message contains the same information as that under SRB2, the BSC6900 replaces the IE RLC info under SRB3 or SRB4 with the IE same as RB:0x2(2) to shorten the length of the message.

When this switch is turned off, the BSC6900 does not replace the IE RLC info under SRB3 or SRB4 in the RRC CONNECTION SETUP message.

3) PS_F2D_OVERLAP_CELLUPT_SWITCH (Switch for Simultaneous PS Service Setup F2D and Cell Update Procedures)

During the PS service setup, the BSC6900 undoes a CELL_FACH-to-CELL_DCH (F2D for short) procedure when it receives a Cell Update message with the cause value "cell reselection" during the F2D procedure.

When this switch is turned on, the BSC6900 temporarily does not send the RANAP_RAB_ASSIGNMENT_RESP message to the CN after the F2D procedure is undone and waits until the Cell Update message is processed and the PS service is set up successfully.

When this switch is turned off, the BSC6900 directly responds to the CN with a RANAP_RAB_ASSIGNMENT_RESP message with the cause value "IU_UNSPEC_FAIL" after the F2D procedure is undone, indicating that the PS service

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Parameter ID

NE MML Command


fails to be set up.

4) TCP_ACK_ACCELERATOR_SWITCH (Switch for Throughput Increase in the Case of Simultaneous uplink and downlink Transmissions)

This switch is turned on to increase the total throughput in the uplink and downlink only when uplink and downlink HSPA data is transmitted simultaneously. In other scenarios, you are advised to turn off the switch.

When this switch is turned on, the function of increasing the total throughput in the case of simultaneous uplink and downlink transmissions takes effect.

When this switch is turned off, the function of increasing the total throughput in the case of simultaneous uplink and downlink transmissions does not take effect.

5) PHY_RECFG_REEST_SWITCH (Switch for RL Reestablishments During the Physical Channel Reconfiguration)

When this switch is turned on, a UE sends the BSC6900 a Cell Update message with the cause value "Radio Link Failure" and the BSC6900 reestablishes the radio link for the UE under the following conditions:

The UE has not responded to the Physical Channel Reconfiguration message.

The BSC6900 detects interrupted downlink transmission on SRB2 or the NodeB reports that all radio

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Parameter ID

NE MML Command


links of the UE are out of synchronization.

When this switch is turned off, the BSC6900 does not reestablish the radio link for the UE under the preceding conditions.

6) IUR_RL_REEST_SWITCH (Iur RL Reestablishment Switch)

When this switch is turned on, a UE sends the BSC6900 a Cell Update message with the cause value "Radio Link Failure" and the BSC6900 reestablishes the radio link for the UE under the following conditions:

The UE has a radio link for the DRNC.

The BSC6900 does not perform any procedures or it performs an active set update or physical channel reconfiguration procedure.

The BSC6900 detects that the SRB2 is disconnected in the downlink or the NodeB reports that all radio links of the UE are out of synchronization.

When this switch is turned off, the BSC6900 does not reestablish the radio link for the UE under the preceding conditions.

7) RB_SETUP_RL_REEST_SWITCH (Switch for RL Reestablishment or Cell Update During an RB Setup)

When this switch is turned on and the BSC6900 is waiting for a UE's response during a radio bearer (RB) setup CELL_DCH-to-CELL_DCH (D2D) procedure:

The BSC6900 reestablishes a

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Parameter ID

NE MML Command


radio link (RL) for the UE if the BSC6900 detects a signaling radio bearer (SRB) reset at layer 2 (L2) or all uplink RLs for the UE are out of synchronization upon expiration of the RL Restore timer. For the RL reestablishment triggered by SRB reset detected by BSC6900, the switch CELLUPT_RLFAILURE_SRBREESTAB_SWITCH under "PROCESSSWITCH2" in the "SET URRCTRLSWITCH" command should be turned on.

The BSC6900 performs a cell update if the BSC6900 receives a CELL UPDATE message with the cause value of RL FAILURE, RLC UNRECOVERABLE ERROR, or REENTERED SERVICE AREA.

When this switch is turned off and the BSC6900 is waiting for a UE's response during an RB setup D2D procedure, the BSC6900 does not perform an RL reestablishment or cell update even if the trigger conditions are met.

8) RRC_CELLFACH_TRB_RESET_TO_F2D_SWITCH (The CELL_FACH-to-CELL_DCH state (F2D) transition switch by TRB reset)

When the BSC6900 receives a TRB reset request from a UE in the CELL_FACH state, the BSC6900 cannot respond to the UE with a confirm message if the FACH is congested. The RRC_CELLFACH_TRB_RESET_TO_F2D_SWITCH parameter specifies whether a UE performs an F2D transition if the number of TRB reset requests from the UE to the BSC6900 reaches a specified

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Parameter ID

NE MML Command


threshold.

If the switch is turned on, the UE moves from the CELL_FACH state to the CELL_DCH state.

If the switch is turned on, the UE does not move from the CELL_FACH state to the CELL_DCH state.

This function helps to reduce the number of call drops caused by the BSC6900 not responding to the TRB reset requests during FACH congestion.

9) SEND_MSG_NULL_SWITCH (MM NULL Message Switch)

Whether the BSC6900 sends an MM NULL message to the CS CN. If the switch RNC_CS_QUERY_UE_IMEI_SWITCH under PROCESSSWITCH2 in the SET URRCTRLSWITCH command is turned on, testing the interworking between the BSC6900 and the CN is required. If the CN needs to verify the serial number of direct transfer messages, turn on this switch.

The BSC6900 rather than the CS CN sends an IDENTITY REQUEST message to a UE to obtain its IMEI. Upon receiving an IDENTITY RESPONSE message from the UE:

The BSC6900 sends an MM NULL message to the CS CN if this switch is turned on.

The BSC6900 does not send an MM NULL message to the CS CN if this switch is turned off.

10) CS_HHO_ASYNC_CTRL_SWITCH(Asynchronous

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50

Parameter ID

NE MML Command


Reconfigure Switch for CS HHO)

When this switch is turned on, the BSC6900 does not put the activation time information element (IE) in the hard handover configuration message for CS services. After receiving the message, the UE immediately activates the configuration.

When this switch is turned off, the BSC6900 puts the activation time IE in the hard handover configuration message for CS services. After receiving the message, the UE activates the configuration at the specified activation time.

11) PS_HHO_ASYNC_CTRL_SWITCH(Asynchronous Reconfigure Switch for PS HHO)

When this switch is turned on, the BSC6900 does not put the activation time information element (IE) in the hard handover configuration message for PS services. After receiving the message, the UE immediately activates the configuration.

When this switch is turned off, the BSC6900 puts the activation time IE in the hard handover configuration message for PS services. After receiving the message, the UE activates the configuration at the specified activation time.

12) IUR_HHO_ASYNC_CTRL_SWITCH(Asynchronous Reconfigure Switch for Iur HHO)

When this switch is turned on, the BSC6900 does not put the

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51

Parameter ID

NE MML Command


activation time information element (IE) in the hard handover configuration message across the Iur interface. After receiving the message, the UE immediately activates the configuration.

When this switch is turned off, the BSC6900 puts the activation time IE in the hard handover configuration message across the Iur interface. After receiving the message, the UE activates the configuration at the specified activation time.

13) R8_UE_SEL_DPUE_SWITCH (Switch for Preferentially Allocating DPUe Resources to UEs That Comply with 3GPP Release 8 or Later)

When this switch is turned on, the BSC6900 preferentially allocates DPUe resources in any subrack to UEs that comply with 3GPP Release 8 or later.

When this switch is turned off, the BSC6900 preferentially allocates DPU resources in the subrack that the UEs access to UEs that comply with 3GPP Release 8 or later. The BSC6900 allocates DPU resources in other subracks only when the amount of consumed DPU resources in this subrack exceeds a preset threshold for inter-subrack resource sharing.

14) F2P_DATATRANS_OPTIMIZE_SWITCH(Switch for Optimized Data Transmission before a State Transition from CELL_FACH to CELL_PCH or URA_PCH)

Whether the BSC6900 queries

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52

Parameter ID

NE MML Command


the RLC state before and after a UE moves from the CELL_FACH state to the CELL_PCH or URA_PCH state due to event 4B.

A UE in the CELL_FACH state can move to the CELL_PCH or URA_PCH state even when there is downlink data transmission for the UE. When this occurs, data packets are suspended on the BSC6900 side. This switch is introduced to solve this problem.

When this switch is turned on, the BSC6900 queries the RLC state before a UE moves from the CELL_FACH state to the CELL_PCH or URA_PCH state due to event 4B. If the state query fails, the UE does not perform the state transition. If the state query succeeds, the UE continues with the state transition. The BSC6900 queries the RLC state again after the state transition is complete and before the L2 link is deactivated. If there is SRB3, SRB4, or TRB data to be transmitted to the UE on the RLC, the paging procedure is triggered.

When this switch is turned off, the original state transition from CELL_FACH to CELL_PCH or URA_PCH is used.


GUI Value Range:PS_F2D_OVERLAP_CELLUPT_SWITCH, AMR_HHO_FAIL_ROLLBACK_SWITCH, PHY_RECFG_REEST_SWITCH, IUR_RL_REEST_SWITCH,

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53

Parameter ID

NE MML Command


RB_SETUP_RL_REEST_SWITCH, RRC_CONN_SETUP_OPT_SWITCH, TCP_ACK_ACCELERATOR_SWITCH, RRC_CELLFACH_TRB_RESET_TO_F2D_SWITCH, SEND_MSG_NULL_SWITCH, CS_HHO_ASYNC_CTRL_SWITCH, PS_HHO_ASYNC_CTRL_SWITCH, IUR_HHO_ASYNC_CTRL_SWITCH, R8_UE_SEL_DPUE_SWITCH, F2P_DATATRANS_OPTIMIZE_SWITCH

Actual Value Range:PS_F2D_OVERLAP_CELLUPT_SWITCH, AMR_HHO_FAIL_ROLLBACK_SWITCH, PHY_RECFG_REEST_SWITCH, IUR_RL_REEST_SWITCH, RB_SETUP_RL_REEST_SWITCH, RRC_CONN_SETUP_OPT_SWITCH, TCP_ACK_ACCELERATOR_SWITCH, RRC_CELLFACH_TRB_RESET_TO_F2D_SWITCH, SEND_MSG_NULL_SWITCH, CS_HHO_ASYNC_CTRL_SWITCH, PS_HHO_ASYNC_CTRL_SWITCH, IUR_HHO_ASYNC_CTRL_SWITCH, R8_UE_SEL_DPUE_SWITCH, F2P_DATATRANS_OPTIMIZE_SWITCH

Unit:None

Default Value:PS_F2D_OVERLAP_CELLUPT_SWITCH-0&AMR_HHO_FAIL_ROLLBACK_SWITCH-0&PHY_RECFG_REEST_SWITCH-0&IUR_RL_REEST_SWIT

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54

Parameter ID

NE MML Command


CH-0&RB_SETUP_RL_REEST_SWITCH-0&RRC_CONN_SETUP_OPT_SWITCH-0&TCP_ACK_ACCELERATOR_SWITCH-0&RRC_CELLFACH_TRB_RESET_TO_F2D_SWITCH-0&SEND_MSG_NULL_SWITCH-0&CS_HHO_ASYNC_CTRL_SWITCH-0&PS_HHO_ASYNC_CTRL_SWITCH-0&IUR_HHO_ASYNC_CTRL_SWITCH-0&R8_UE_SEL_DPUE_SWITCH-0&F2P_DATATRANS_OPTIMIZE_SWITCH-0

RbRecfgRspTmr

BSC6900

SET USTATETIMER

WRFD-010101 3GPP R9 Specifications Meaning:A timer used to wait for the RB reconfiguration response from UE in the RB procedure. Refer to the Note.



Unit:ms

Default Value:5000

RbSetupRspTmr

BSC6900

SET USTATETIMER

WRFD-010101 3GPP R9 Specifications Meaning:A timer to RNC wait for the RB setup response from UE in the RB procedure. Refer to the Note.



Unit:ms

Default Value:5000

ReservedSwitch1

BSC6900

SET UCORRMPARA

None None Meaning:CORRM algorithm reserved switch 1. The switch is reserved for further change request use.

Disuse statement: This parameter is used temporarily in patch versions and will be replaced with a new parameter in later versions. The new parameter ID reflects the














../RNCParaHtml/mbsc/m-mml/set-ucorrmpara.html



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55

Parameter ID

NE MML Command


parameter function. Therefore, this parameter is not recommended for the configuration interface.

GUI Value Range:RESERVED_SWITCH_1_BIT1, RESERVED_SWITCH_1_BIT2, RESERVED_SWITCH_1_BIT3, RESERVED_SWITCH_1_BIT4, RESERVED_SWITCH_1_BIT5, RESERVED_SWITCH_1_BIT6, RESERVED_SWITCH_1_BIT7, RESERVED_SWITCH_1_BIT8, RESERVED_SWITCH_1_BIT9, RESERVED_SWITCH_1_BIT10, RESERVED_SWITCH_1_BIT11, RESERVED_SWITCH_1_BIT12, RESERVED_SWITCH_1_BIT13, RESERVED_SWITCH_1_BIT14, RESERVED_SWITCH_1_BIT15, RESERVED_SWITCH_1_BIT16, RESERVED_SWITCH_1_BIT17, RESERVED_SWITCH_1_BIT18, RESERVED_SWITCH_1_BIT19, RESERVED_SWITCH_1_BIT20, RESERVED_SWITCH_1_BIT21, RESERVED_SWITCH_1_BIT22, RESERVED_SWITCH_1_BIT23, RESERVED_SWITCH_1_BIT24, RESERVED_SWITCH_1_BIT25, RESERVED_SWITCH_1_BIT26, RESERVED_SWITCH_1_BIT27, RESERVED_SWITCH_1_BIT2

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56

Parameter ID

NE MML Command


8, RESERVED_SWITCH_1_BIT29, RESERVED_SWITCH_1_BIT30, RESERVED_SWITCH_1_BIT31, RESERVED_SWITCH_1_BIT32

Actual Value Range:RESERVED_SWITCH_1_BIT1, RESERVED_SWITCH_1_BIT2, RESERVED_SWITCH_1_BIT3, RESERVED_SWITCH_1_BIT4, RESERVED_SWITCH_1_BIT5, RESERVED_SWITCH_1_BIT6, RESERVED_SWITCH_1_BIT7, RESERVED_SWITCH_1_BIT8, RESERVED_SWITCH_1_BIT9, RESERVED_SWITCH_1_BIT10, RESERVED_SWITCH_1_BIT11, RESERVED_SWITCH_1_BIT12, RESERVED_SWITCH_1_BIT13, RESERVED_SWITCH_1_BIT14, RESERVED_SWITCH_1_BIT15, RESERVED_SWITCH_1_BIT16, RESERVED_SWITCH_1_BIT17, RESERVED_SWITCH_1_BIT18, RESERVED_SWITCH_1_BIT19, RESERVED_SWITCH_1_BIT20, RESERVED_SWITCH_1_BIT21, RESERVED_SWITCH_1_BIT22, RESERVED_SWITCH_1_BIT23, RESERVED_SWITCH_1_BIT24, RESERVED_SWITCH_1_BIT25,

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57

Parameter ID

NE MML Command


RESERVED_SWITCH_1_BIT26, RESERVED_SWITCH_1_BIT27, RESERVED_SWITCH_1_BIT28, RESERVED_SWITCH_1_BIT29, RESERVED_SWITCH_1_BIT30, RESERVED_SWITCH_1_BIT31, RESERVED_SWITCH_1_BIT32

Unit:None

Default Value:RESERVED_SWITCH_1_BIT1-0&RESERVED_SWITCH_1_BIT2-0&RESERVED_SWITCH_1_BIT3-0&RESERVED_SWITCH_1_BIT4-0&RESERVED_SWITCH_1_BIT5-0&RESERVED_SWITCH_1_BIT6-1&RESERVED_SWITCH_1_BIT7-0&RESERVED_SWITCH_1_BIT8-0&RESERVED_SWITCH_1_BIT9-0&RESERVED_SWITCH_1_BIT10-0&RESERVED_SWITCH_1_BIT11-0&RESERVED_SWITCH_1_BIT12-0&RESERVED_SWITCH_1_BIT13-0&RESERVED_SWITCH_1_BIT14-0&RESERVED_SWITCH_1_BIT15-0&RESERVED_SWITCH_1_BIT16-0&RESERVED_SWITCH_1_BIT17-0&RESERVED_SWITCH_1_BIT18-0&RESERVED_SWITCH_1_BIT19-0&RESERVED_SWITCH_1_BIT20-0&RESERVED_SWITCH_1_BIT21-0&RESERVED_SWITCH_1_BIT22-0&RESERVED_SWITCH_1_BIT23-0&RESERVED_SWITCH_1_BIT24-0&RESERVED_SWITCH_1_BIT25-0&RESERVED_SWITCH_1_BIT26-0&RESERVED_SWITCH_1_BIT27-0&RESERVED_SWITCH_1_BIT28-0&RESERVED_SWITCH_1_BIT29-0&RESERVED_SWITCH_1_BIT30-0&RESERVED_SWITCH_1_BI

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58

Parameter ID

NE MML Command


T31-0&RESERVED_SWITCH_1_BIT32-0

RlRstrTmr

BSC6900

SET USTATETIMER

WRFD-010101 3GPP R9 Specifications Meaning:A timer to RNC wait for radio link restoration indication in the radio link procedure.

Note: The value range of "RlRstrTmr" is 1 to 300000 in the current version. In a later version, the value range changes into 100 to 300000. In the current version, if you enter a value within the range of 1 to 100 including 1, this value can still be synchronized and issued but the system regards the value as 11000, the recommended value. Therefore, you are advised not to enter a value smaller than 100.



Unit:ms

Default Value:11000

RsvdPara1

BSC6900

SET URRCTRLSWITCH

WRFD-010101 3GPP R9 Specifications Meaning:2) NAS_QOS_MOD_SWITCH (QoS Change Switch for NAS)

When the switch is turned on, for UEs whose HS-DSCH category is smaller than 13, if the maximum downlink rate specified in the PDP activation requests from the UEs exceeds 16 Mbit/s, the requests are sent to the CN after the rate is changed to 16 Mbit/s.

When the switch is turned off, the PDP activation requests are sent to the CN without changing the maximum downlink rate.

15) RSVDBIT1_BIT15 (Reserved Parameter 1 Bit 15)

When the switch is turned on,











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59

Parameter ID

NE MML Command


the RNC enables the function of AMR mute detection.

When the switch is turned off, the RNC disables the function of AMR mute detection.


When the switch is turned on, the RNC can perform DRDs during the P2D procedure.

When the switch is turned off, the RNC cannot perform DRDs during the P2D procedure.

17) SYSHO_CSIN_PERMIT_SWITCH (2G-to-3G CS Handover Switch)

When the switch is turned on, inter-RAT CS handovers from 2G cells to 3G cells are allowed.

When the switch is turned off, inter-RAT CS handovers from 2G cells to 3G cells are not allowed.


When this switch is turned on, the RNC performs a state transition from CELL_PCH or URA_PCH to CELL_FACH (P2F) upon receiving a CELL UPDATE message with the cause value "uplink data transmission" or "paging response".

When this switch is turned off, if receiving a CELL UPDATE message with the cause value "uplink data transmission" or "paging response," the RNC performs a state transition from CELL_PCH or URA_PCH to CELL_DCH (P2D) in either of the following scenarios:

(1)Congestion occurs on the

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60

Parameter ID

NE MML Command


FACH.

(2)Congestion occurs on the DCCH, and the value of the Establishment cause information element (IE) in the message is Originating Conversational Call, Terminating Conversational Call, or Emergency Call.


When the switch is turned on, for UEs that are establishing AMR services and shifting from the CELL_FACH state to the CELL_DCH state, the RNC stops establishing AMR services to handle cell update if the RNC receives from the UEs a cell update message containing the cause value "cell reselection."

When the switch is turned off, for UEs that are establishing AMR services and shifting from the CELL_FACH state to the CELL_DCH state, if the RNC receives from the UEs a cell update message containing the cause value "cell reselection," the RNC stops establishing AMR services to handle cell update and resumes AMR services only after cell update is completed.


When the switch is turned on, the RNC does not trigger cell update with the cause value "RL Failure" if the RNC detects interrupted downlink transmission on SRB2.

When the switch is turned off, the RNC triggers cell update with the cause value "RL Failure" and reestablishes radio links if the RNC detects

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61

Parameter ID

NE MML Command


interrupted downlink transmission on SRB2.


When the switch is turned on, the RNC does not trigger cell update with the cause value "RL Failure" reported by a UE if the associated NodeB reports to the RNC that all radio links for the UE experience synchronization loss.

When the switch is turned off, the RNC triggers cell update with the cause value "RL Failure" reported by a UE and reestablishes radio links, if the associated NodeB reports to the RNC that all radio links for the UE experience synchronization loss.


When the switch is turned on, for UEs using CS services, the RNC does not trigger cell update with the cause value "RL Failure" reported by a UE, if the RNC detects interrupted downlink transmission on SRB2, or if the associated NodeB reports to the RNC that all radio links for the UE experience synchronization loss.

When the switch is turned off, for UEs using CS services, the RNC triggers cell update with the cause value "RL Failure" reported by a UE and reestablishes radio links, if the RNC detects interrupted downlink transmission on SRB2, or if the associated NodeB reports to the RNC that all radio links for the UE experience synchronization loss.

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62

Parameter ID

NE MML Command



When the switch is turned on, for UEs using PS services only, the RNC does not reestablish radio links for a UE if the RNC detects interrupted downlink transmission on SRB2, or if the associated NodeB reports to the RNC that all radio links for the UE experience synchronization loss.

When the switch is turned off, for UEs using PS services only, the RNC triggers cell update with the cause value "RL Failure" reported by a UE and reestablishes radio link, if the RNC detects interrupted downlink transmission on SRB2, or if the associated NodeB reports to the RNC that all radio links for the UE experience synchronization loss.


When the switch is turned on, the RNC does not reestablish radio links for a UE if the UE reports to the RNC cell update caused by SRB reset.

When the switch is turned off, the RNC reestablishes radio links for a UE if the UE reports to the RNC cell update caused by SRB reset.


When the switch is turned on, for UEs using CS services, if a NodeB reports to the RNC that all radio links for a UE experience synchronization loss, the RNC starts the RL Restore timer whose duration is specified by the RlRstrTmr parameter in the SET

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63

Parameter ID

NE MML Command


USTATETIMER command. After the timer has expired, the RNC triggers cell update with the cause value "radio link failure" and reestablishes radio links for the UE.

When the switch is turned off, for UEs using CS services, if a NodeB reports to the RNC that all radio links for a UE experience synchronization loss, the RNC starts the RL Restore timer whose duration is specified by the T313 parameter in the SET UCONNMODETIMER command. After the timer has expired, the RNC triggers cell update with the cause value "radio link failure" and reestablishes radio links for the UE.


When the switch is turned off, the RNC performs the CELL_DCH-to-CELL_FACH (D2F for short) procedure on UEs that support fast dormancy.

When the switch is turned on, the RNC performs the CELL_DCH-to-CELL_PCH (D2P for short) procedure on UEs that support fast dormancy.

Disuse statement: This parameter is used temporarily in patch versions and will be replaced with a new parameter in later versions. The new parameter ID reflects the parameter function. Therefore, this parameter is not recommended for the configuration interface.

GUI Value Range:RSVDBIT1_BIT1, NAS_QOS_MOD_SWITCH, RSVDBIT1_BIT3,

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64

Parameter ID

NE MML Command


RSVDBIT1_BIT4, RSVDBIT1_BIT5, RSVDBIT1_BIT6, RSVDBIT1_BIT7, RSVDBIT1_BIT8, RSVDBIT1_BIT9, RSVDBIT1_BIT10, RSVDBIT1_BIT11, RSVDBIT1_BIT12, RSVDBIT1_BIT13, RSVDBIT1_BIT14, RSVDBIT1_BIT15, RSVDBIT1_BIT16, SYSHO_CSIN_PERMIT_SWITCH, RSVDBIT1_BIT18, RSVDBIT1_BIT19, RSVDBIT1_BIT20, RSVDBIT1_BIT21, RSVDBIT1_BIT22, RSVDBIT1_BIT23, RSVDBIT1_BIT24, RSVDBIT1_BIT25, RSVDBIT1_BIT26, RSVDBIT1_BIT27, RSVDBIT1_BIT28, RSVDBIT1_BIT29, RSVDBIT1_BIT30, RSVDBIT1_BIT31, RSVDBIT1_BIT32

Actual Value Range:This parameter is set to 0 or 1 according to the related domains.

Unit:None

Default Value:RSVDBIT1_BIT1-0&NAS_QOS_MOD_SWITCH-0&RSVDBIT1_BIT3-0&RSVDBIT1_BIT4-0&RSVDBIT1_BIT5-0&RSVDBIT1_BIT6-0&RSVDBIT1_BIT7-0&RSVDBIT1_BIT8-0&RSVDBIT1_BIT9-0&RSVDBIT1_BIT10-0&RSVDBIT1_BIT11-0&RSVDBIT1_BIT12-0&RSVDBIT1_BIT13-0&RSVDBIT1_BIT14-0&RSVDBIT1_BIT15-0&RSVDBIT1_BIT16-0&SYSHO_CSIN_PERMIT_SWITCH-1&RSVDBIT1_BIT18-1&RSVDBIT1_BIT19-1&RSVDBIT1_BIT20-1&RSVDBIT1_

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65

Parameter ID

NE MML Command


BIT21-1&RSVDBIT1_BIT22-1&RSVDBIT1_BIT23-1&RSVDBIT1_BIT24-1&RSVDBIT1_BIT25-1&RSVDBIT1_BIT26-1&RSVDBIT1_BIT27-1&RSVDBIT1_BIT28-1&RSVDBIT1_BIT29-1&RSVDBIT1_BIT30-1&RSVDBIT1_BIT31-0&RSVDBIT1_BIT32-1

RsvdPara2

BSC6900

SET URRCTRLSWITCH

WRFD-010101 3GPP R9 Specifications Meaning:Reserved parameter 2.


GUI Value Range:RSVDBIT1_BIT1, RSVDBIT1_BIT2, RSVDBIT1_BIT3, RSVDBIT1_BIT4, RSVDBIT1_BIT5, RSVDBIT1_BIT6, RSVDBIT1_BIT7, RSVDBIT1_BIT8, RSVDBIT1_BIT9, RSVDBIT1_BIT10, RSVDBIT1_BIT11, RSVDBIT1_BIT12, RSVDBIT1_BIT13, RSVDBIT1_BIT14, RSVDBIT1_BIT15, RSVDBIT1_BIT16, RSVDBIT1_BIT17, RSVDBIT1_BIT18, RSVDBIT1_BIT19, RSVDBIT1_BIT20, RSVDBIT1_BIT21, RSVDBIT1_BIT22, RSVDBIT1_BIT23, RSVDBIT1_BIT24, RSVDBIT1_BIT25, RSVDBIT1_BIT26, RSVDBIT1_BIT27, RSVDBIT1_BIT28, RSVDBIT1_BIT29,






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66

Parameter ID

NE MML Command


RSVDBIT1_BIT30, RSVDBIT1_BIT31, RSVDBIT1_BIT32


Unit:None

Default Value:RSVDBIT1_BIT1-0&RSVDBIT1_BIT2-0&RSVDBIT1_BIT3-0&RSVDBIT1_BIT4-0&RSVDBIT1_BIT5-0&RSVDBIT1_BIT6-0&RSVDBIT1_BIT7-0&RSVDBIT1_BIT8-0&RSVDBIT1_BIT9-0&RSVDBIT1_BIT10-0&RSVDBIT1_BIT11-0&RSVDBIT1_BIT12-0&RSVDBIT1_BIT13-0&RSVDBIT1_BIT14-0&RSVDBIT1_BIT15-0&RSVDBIT1_BIT16-0&RSVDBIT1_BIT17-0&RSVDBIT1_BIT18-0&RSVDBIT1_BIT19-0&RSVDBIT1_BIT20-0&RSVDBIT1_BIT21-0&RSVDBIT1_BIT22-0&RSVDBIT1_BIT23-0&RSVDBIT1_BIT24-0&RSVDBIT1_BIT25-0&RSVDBIT1_BIT26-0&RSVDBIT1_BIT27-0&RSVDBIT1_BIT28-0&RSVDBIT1_BIT29-0&RSVDBIT1_BIT30-0&RSVDBIT1_BIT31-0&RSVDBIT1_BIT32-0

RsvdPara3

BSC6900

SET URRCTRLSWITCH

WRFD-010101 3GPP R9 Specifications Meaning:Reserved parameter 3.


GUI Value Range:RSVDBIT1_BIT1, RSVDBIT1_BIT2, RSVDBIT1_BIT3,






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67

Parameter ID

NE MML Command


RSVDBIT1_BIT4, RSVDBIT1_BIT5, RSVDBIT1_BIT6, RSVDBIT1_BIT7, RSVDBIT1_BIT8, RSVDBIT1_BIT9, RSVDBIT1_BIT10, RSVDBIT1_BIT11, RSVDBIT1_BIT12, RSVDBIT1_BIT13, RSVDBIT1_BIT14, RSVDBIT1_BIT15, RSVDBIT1_BIT16, RSVDBIT1_BIT17, RSVDBIT1_BIT18, RSVDBIT1_BIT19, RSVDBIT1_BIT20, RSVDBIT1_BIT21, RSVDBIT1_BIT22, RSVDBIT1_BIT23, RSVDBIT1_BIT24, RSVDBIT1_BIT25, RSVDBIT1_BIT26, RSVDBIT1_BIT27, RSVDBIT1_BIT28, RSVDBIT1_BIT29, RSVDBIT1_BIT30, RSVDBIT1_BIT31, RSVDBIT1_BIT32


Unit:None

Default Value:RSVDBIT1_BIT1-1&RSVDBIT1_BIT2-1&RSVDBIT1_BIT3-1&RSVDBIT1_BIT4-1&RSVDBIT1_BIT5-1&RSVDBIT1_BIT6-1&RSVDBIT1_BIT7-1&RSVDBIT1_BIT8-1&RSVDBIT1_BIT9-1&RSVDBIT1_BIT10-1&RSVDBIT1_BIT11-1&RSVDBIT1_BIT12-1&RSVDBIT1_BIT13-1&RSVDBIT1_BIT14-1&RSVDBIT1_BIT15-1&RSVDBIT1_BIT16-1&RSVDBIT1_BIT17-1&RSVDBIT1_BIT18-1&RSVDBIT1_BIT19-1&RSVDBIT1_BIT20-1&RSVDBIT1_BIT21-1&RSVDBIT1_BIT22-

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Parameter ID

NE MML Command


1&RSVDBIT1_BIT23-1&RSVDBIT1_BIT24-1&RSVDBIT1_BIT25-1&RSVDBIT1_BIT26-1&RSVDBIT1_BIT27-1&RSVDBIT1_BIT28-1&RSVDBIT1_BIT29-1&RSVDBIT1_BIT30-1&RSVDBIT1_BIT31-1&RSVDBIT1_BIT32-1

T302 BSC6900

SET UCONNMODETIMER

WRFD-010101 3GPP R9 Specifications Meaning:T302 is started after the UE transmits the CELL UPDATE/URA UPDATE message and stopped after the UE receives the CELL UPDATE CONFIRM/URA UPDATE CONFIRM message. CELL UPDATE/URA UPDATE will be resent upon the expiry of the timer if V302 less than or equal to N302; otherwise, the UE will enter idle mode. Protocol default value is 4000.

GUI Value Range:D100, D200, D400, D600, D800, D1000, D1200, D1400, D1600, D1800, D2000, D3000, D4000, D6000, D8000

Actual Value Range:100, 200, 400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000, 3000, 4000, 6000, 8000

Unit:ms

Default Value:D2000

T313 BSC6900

SET UCONNMODETIMER

WRFD-010101 3GPP R9 Specifications Meaning:T313 is started after the UE detects consecutive N313 "out of sync" indications from L1. T313 is stopped after the UE detects consecutive N315 "in sync" indications from L1.It indicates Radio Link (RL) failure upon expiry. Protocol default value is 3.



Unit:s









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69

Parameter ID

NE MML Command


Default Value:3

T314 BSC6900

SET UCONNMODETIMER

WRFD-010101 3GPP R9 Specifications Meaning:T314 is started when the criteria for radio link failure are fulfilled and only radio bearers (RBs) associated with T314 exist.T314 is stopped after the Cell Update procedure has been completed. Protocol default value is 12.

In case of the RL failure when the UE is in CELL_DCH state, If the RL cannot be successfully reconfigured by CELL UPDATE CONFIRM before the expiry of the corresponding T314 (or T315), CELL UPDATE will be resent for RL reconfiguration (this operation relates to T302 and N302). It is recommended that T314 be set to greater than T302*N302. The smaller the value of T314 is, the higher the call drop rate of the corresponding service is. When T314 expires and the UE is performing a CS service, or T315 expires and the UE is performing a PS service,the BSC6900 releases the RRC connection.



Unit:s

Default Value:D0

T315 BSC6900

SET UCONNMODETIMER

WRFD-010101 3GPP R9 Specifications Meaning:T315 is started when the criteria for radio link failure are fulfilled, and only the radio bearer associated with T315 exists.T315 is stopped after the Cell Update procedure has been completed. Protocol default value is 180.

In case of the RL failure when the UE is in CELL_DCH state,









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Parameter ID

NE MML Command


T315 (or T314) is started and CELL UPDATE is sent. If the RL cannot be successfully reconfigured by CELL UPDATE CONFIRM before the expiry of the corresponding T315 (or T314), CELL UPDATE will be resent for RL reconfiguration (this operation relates to T302 and N302). It is recommended that T315 be set to greater than T302*N302. The smaller the value of T315 is, the higher the call drop rate of the corresponding service is. When T314 expires and the UE is performing a CS service, or T315 expires and the UE is performing a PS service,the BSC6900 releases the RRC connection.



Unit:s

Default Value:D0

TRlFailure

BSC6900

ADD UCELLSETUP


Meaning:Radio link failure timer duration. When the radio link set is in the synchronized state, the NodeB starts the timer after it receives successive out-of-sync indications of the number defined by NOutsyncInd. The NodeB shall stop and reset the timer after receiving successive in-sync indications of the number defined by NInsyncInd. When the timer expires, the NodeB triggers the radio link failure process, and indicates which radio link set is out-of-sync.


Actual Value Range:0~25.5






WCDMA RAN




71

Parameter ID

NE MML Command


Unit:0.1s

Default Value:50

WCDMA RAN

Call Reestablishment 12 Counters



72

12 Counters

There are no specific counters associated with this feature.

WCDMA RAN

Call Reestablishment 13 Glossary



73

13 Glossary

For the acronyms, abbreviations, terms, and definitions, see Glossary.

WCDMA RAN

Call Reestablishment 14 Reference Documents



74

14 Reference Documents

1. 3GPP TS 25.331, "Radio Resource Control (RRC); Protocol specification"

2. 3GPP TS 25.214, "Physical layer procedures (FDD)"

Technology

Huawei Call Reestablishment RAN14